"use client";

import Image from "next/image";
import Link from "next/link";
import { useRouter } from "next/navigation";
import { useEffect, useState } from "react";
import { useAuth } from "@/context/AuthContext";
import { useCart } from "@/context/CartContext";

export default function DisplayNav() {
  const { user, logout, loading } = useAuth();
  const { itemCount, selectedStoreId, setStoreId } = useCart();
  const router = useRouter();
  const [stores, setStores] = useState([]);
  const [menuOpen, setMenuOpen] = useState(false);

  useEffect(() => {
    fetch("/api/v1/stores?size=100")
      .then((r) => (r.ok ? r.json() : null))
      .then((data) => { if (data) setStores(data.content ?? []); })
      .catch(() => {});
  }, []);

  function handleLogout() {
    logout();
    router.push("/");
    setMenuOpen(false);
  }

  function closeMenu() {
    setMenuOpen(false);
  }

  return (
    <nav className="navbar">
      <Link href="/" onClick={closeMenu}>
        <Image
          className="mx-3"
          src="/logo_simple.png"
          alt="store_logo"
          width={50}
          height={50}
          id="logo"
          loading="eager"
        />
      </Link>

      {/* Desktop: inline links + auth */}
      <div className="nav-links">
        <Link href="/" className="nav-link">Home</Link>
        <Link href="/adopt" className="nav-link">Adopt</Link>
        <Link href="/products" className="nav-link">Store</Link>
        <Link href="/appointments" className="nav-link">Appointments</Link>
        <Link href="/ai-chat" className="nav-link">Help</Link>
        <Link href="/contact" className="nav-link">Contact</Link>
      {/*}  <Link href="/about" className="nav-link">About</Link> */}
      </div>

      <div className="nav-auth">
        {user && stores.length > 0 && (
          <select
            className="nav-store-select"
            value={selectedStoreId ?? ""}
            onChange={(e) => setStoreId(e.target.value || null)}
          >
            <option value="">All Stores</option>
            {stores.map((s) => (
              <option key={s.storeId} value={s.storeId}>
                {s.storeName}
              </option>
            ))}
          </select>
        )}

        {user && (
          <Link href="/cart" className="nav-cart-btn" aria-label="Cart">
            🛒
            {itemCount > 0 && (
              <span className="nav-cart-badge">{itemCount > 99 ? "99+" : itemCount}</span>
            )}
          </Link>
        )}

        {loading ? null : user ? (
          <>
            <Link href="/profile" className="nav-link nav-greeting">
              Hello, {(user.fullName || user.username).split(" ")[0]}
            </Link>
            <button type="button" className="nav-logout-btn" onClick={handleLogout}>
              Log Out
            </button>
          </>
        ) : (
          <>
            <Link href="/login" className="nav-link">Log In</Link>
            <Link href="/register" className="nav-link nav-register-btn">Register</Link>
          </>
        )}
      </div>

      {/* Mobile: cart icon + hamburger always in topbar */}
      <div className="nav-mobile-bar">
        {user && (
          <Link href="/cart" className="nav-cart-btn" aria-label="Cart" onClick={closeMenu}>
            🛒
            {itemCount > 0 && (
              <span className="nav-cart-badge">{itemCount > 99 ? "99+" : itemCount}</span>
            )}
          </Link>
        )}
        <button
          className={`nav-hamburger${menuOpen ? " nav-hamburger--open" : ""}`}
          aria-label="Toggle navigation menu"
          aria-expanded={menuOpen}
          onClick={() => setMenuOpen((o) => !o)}
        >
          <span />
          <span />
          <span />
        </button>
      </div>

      {/* Mobile dropdown drawer */}
      {menuOpen && (
        <div className="nav-drawer">
          <Link href="/" className="nav-drawer-link" onClick={closeMenu}>Home</Link>
          <Link href="/adopt" className="nav-drawer-link" onClick={closeMenu}>Adopt</Link>
          <Link href="/products" className="nav-drawer-link" onClick={closeMenu}>Store</Link>
          <Link href="/appointments" className="nav-drawer-link" onClick={closeMenu}>Appointments</Link>
          <Link href="/ai-chat" className="nav-drawer-link" onClick={closeMenu}>Help</Link>
          <Link href="/contact" className="nav-drawer-link" onClick={closeMenu}>Contact</Link>
         {/* <Link href="/about" className="nav-drawer-link" onClick={closeMenu}>About</Link> */}

          <div className="nav-drawer-divider" />

          {user && stores.length > 0 && (
            <select
              className="nav-store-select nav-store-select--drawer"
              value={selectedStoreId ?? ""}
              onChange={(e) => { setStoreId(e.target.value || null); closeMenu(); }}
            >
              <option value="">All Stores</option>
              {stores.map((s) => (
                <option key={s.storeId} value={s.storeId}>
                  {s.storeName}
                </option>
              ))}
            </select>
          )}

          {loading ? null : user ? (
            <>
              <Link href="/profile" className="nav-drawer-link" onClick={closeMenu}>
                My Profile ({user.fullName || user.username})
              </Link>
              <button type="button" className="nav-logout-btn nav-logout-btn--drawer" onClick={handleLogout}>
                Log Out
              </button>
            </>
          ) : (
            <>
              <Link href="/login" className="nav-drawer-link" onClick={closeMenu}>Log In</Link>
              <Link href="/register" className="nav-drawer-link nav-drawer-link--register" onClick={closeMenu}>Register</Link>
            </>
          )}
        </div>
      )}
    </nav>
  );
}